I don’t see the button in my computer to erase all content
I’m trying to erase all the content on my MacBook Pro but I don’t see the erase button in desk utility. What should I do?
The "erase" button in Disk Utility becomes active when you click on the topmost level of the internal drive:
It won't "erase" if you're doing this whilst you're logged in. Think of it a bit like changing the wheels on your car whilst you're driving it.
For the "erase" option to be effective restart in Recovery Mode:
https://support.apple.com/en-gb/HT201314
Bear in mind everything will be deleted so make a back-up first if you don't want to lose anything important.
Good luck